1 /* $NetBSD: in6_pcb.c,v 1.114 2011/05/04 01:45:48 dyoung Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.114 2011/05/04 01:45:48 dyoung Exp $"); 66 67 #include "opt_inet.h" 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/time.h> 80 #include <sys/proc.h> 81 #include <sys/kauth.h> 82 #include <sys/domain.h> 83 #include <sys/once.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/in_systm.h> 91 #include <netinet/ip.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/ip6.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/scope6_var.h> 97 #include <netinet6/nd6.h> 98 99 #include "faith.h" 100 101 #ifdef IPSEC 102 #include <netinet6/ipsec.h> 103 #include <netkey/key.h> 104 #endif /* IPSEC */ 105 106 #ifdef FAST_IPSEC 107 #include <netipsec/ipsec.h> 108 #include <netipsec/ipsec6.h> 109 #include <netipsec/key.h> 110 #endif /* FAST_IPSEC */ 111 112 #include <netinet/tcp_vtw.h> 113 114 const struct in6_addr zeroin6_addr; 115 116 #define IN6PCBHASH_PORT(table, lport) \ 117 &(table)->inpt_porthashtbl[ntohs(lport) & (table)->inpt_porthash] 118 #define IN6PCBHASH_BIND(table, laddr, lport) \ 119 &(table)->inpt_bindhashtbl[ \ 120 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 121 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + ntohs(lport)) & \ 122 (table)->inpt_bindhash] 123 #define IN6PCBHASH_CONNECT(table, faddr, fport, laddr, lport) \ 124 &(table)->inpt_bindhashtbl[ \ 125 ((((faddr)->s6_addr32[0] ^ (faddr)->s6_addr32[1] ^ \ 126 (faddr)->s6_addr32[2] ^ (faddr)->s6_addr32[3]) + ntohs(fport)) + \ 127 (((laddr)->s6_addr32[0] ^ (laddr)->s6_addr32[1] ^ \ 128 (laddr)->s6_addr32[2] ^ (laddr)->s6_addr32[3]) + \ 129 ntohs(lport))) & (table)->inpt_bindhash] 130 131 int ip6_anonportmin = IPV6PORT_ANONMIN; 132 int ip6_anonportmax = IPV6PORT_ANONMAX; 133 int ip6_lowportmin = IPV6PORT_RESERVEDMIN; 134 int ip6_lowportmax = IPV6PORT_RESERVEDMAX; 135 136 static struct pool in6pcb_pool; 137 138 static int 139 in6pcb_poolinit(void) 140 { 141 142 pool_init(&in6pcb_pool, sizeof(struct in6pcb), 0, 0, 0, "in6pcbpl", 143 NULL, IPL_SOFTNET); 144 return 0; 145 } 146 147 void 148 in6_pcbinit(struct inpcbtable *table, int bindhashsize, int connecthashsize) 149 { 150 static ONCE_DECL(control); 151 152 in_pcbinit(table, bindhashsize, connecthashsize); 153 table->inpt_lastport = (u_int16_t)ip6_anonportmax; 154 155 RUN_ONCE(&control, in6pcb_poolinit); 156 } 157 158 int 159 in6_pcballoc(struct socket *so, void *v) 160 { 161 struct inpcbtable *table = v; 162 struct in6pcb *in6p; 163 int s; 164 #if defined(IPSEC) || defined(FAST_IPSEC) 165 int error; 166 #endif 167 168 s = splnet(); 169 in6p = pool_get(&in6pcb_pool, PR_NOWAIT); 170 splx(s); 171 if (in6p == NULL) 172 return (ENOBUFS); 173 memset((void *)in6p, 0, sizeof(*in6p)); 174 in6p->in6p_af = AF_INET6; 175 in6p->in6p_table = table; 176 in6p->in6p_socket = so; 177 in6p->in6p_hops = -1; /* use kernel default */ 178 in6p->in6p_icmp6filt = NULL; 179 #if defined(IPSEC) || defined(FAST_IPSEC) 180 error = ipsec_init_pcbpolicy(so, &in6p->in6p_sp); 181 if (error != 0) { 182 s = splnet(); 183 pool_put(&in6pcb_pool, in6p); 184 splx(s); 185 return error; 186 } 187 #endif /* IPSEC */ 188 s = splnet(); 189 CIRCLEQ_INSERT_HEAD(&table->inpt_queue, (struct inpcb_hdr*)in6p, 190 inph_queue); 191 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 192 &in6p->in6p_head, inph_lhash); 193 in6_pcbstate(in6p, IN6P_ATTACHED); 194 splx(s); 195 if (ip6_v6only) 196 in6p->in6p_flags |= IN6P_IPV6_V6ONLY; 197 so->so_pcb = (void *)in6p; 198 return (0); 199 } 200 201 /* 202 * Bind address from sin6 to in6p. 203 */ 204 static int 205 in6_pcbbind_addr(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 206 { 207 int error; 208 209 /* 210 * We should check the family, but old programs 211 * incorrectly fail to intialize it. 212 */ 213 if (sin6->sin6_family != AF_INET6) 214 return (EAFNOSUPPORT); 215 216 #ifndef INET 217 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 218 return (EADDRNOTAVAIL); 219 #endif 220 221 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 222 return (error); 223 224 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 225 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 226 return (EINVAL); 227 if (sin6->sin6_addr.s6_addr32[3]) { 228 struct sockaddr_in sin; 229 230 memset(&sin, 0, sizeof(sin)); 231 sin.sin_len = sizeof(sin); 232 sin.sin_family = AF_INET; 233 bcopy(&sin6->sin6_addr.s6_addr32[3], 234 &sin.sin_addr, sizeof(sin.sin_addr)); 235 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 236 return EADDRNOTAVAIL; 237 } 238 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 239 struct ifaddr *ia = NULL; 240 241 if ((in6p->in6p_flags & IN6P_FAITH) == 0 && 242 (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 243 return (EADDRNOTAVAIL); 244 245 /* 246 * bind to an anycast address might accidentally 247 * cause sending a packet with an anycast source 248 * address, so we forbid it. 249 * 250 * We should allow to bind to a deprecated address, 251 * since the application dare to use it. 252 * But, can we assume that they are careful enough 253 * to check if the address is deprecated or not? 254 * Maybe, as a safeguard, we should have a setsockopt 255 * flag to control the bind(2) behavior against 256 * deprecated addresses (default: forbid bind(2)). 257 */ 258 if (ia && 259 ((struct in6_ifaddr *)ia)->ia6_flags & 260 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) 261 return (EADDRNOTAVAIL); 262 } 263 264 265 in6p->in6p_laddr = sin6->sin6_addr; 266 267 268 return (0); 269 } 270 271 /* 272 * Bind port from sin6 to in6p. 273 */ 274 static int 275 in6_pcbbind_port(struct in6pcb *in6p, struct sockaddr_in6 *sin6, struct lwp *l) 276 { 277 struct inpcbtable *table = in6p->in6p_table; 278 struct socket *so = in6p->in6p_socket; 279 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 280 int error; 281 282 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 283 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 284 (so->so_options & SO_ACCEPTCONN) == 0)) 285 wild = 1; 286 287 if (sin6->sin6_port != 0) { 288 enum kauth_network_req req; 289 290 #ifndef IPNOPRIVPORTS 291 if (ntohs(sin6->sin6_port) < IPV6PORT_RESERVED) 292 req = KAUTH_REQ_NETWORK_BIND_PRIVPORT; 293 else 294 #endif /* IPNOPRIVPORTS */ 295 req = KAUTH_REQ_NETWORK_BIND_PORT; 296 297 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND, 298 req, so, sin6, NULL); 299 if (error) 300 return (EACCES); 301 } 302 303 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 304 /* 305 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 306 * allow compepte duplication of binding if 307 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 308 * and a multicast address is bound on both 309 * new and duplicated sockets. 310 */ 311 if (so->so_options & SO_REUSEADDR) 312 reuseport = SO_REUSEADDR|SO_REUSEPORT; 313 } 314 315 if (sin6->sin6_port != 0) { 316 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 317 #ifdef INET 318 struct inpcb *t; 319 struct vestigial_inpcb vestige; 320 321 t = in_pcblookup_port(table, 322 *(struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 323 sin6->sin6_port, wild, &vestige); 324 if (t && (reuseport & t->inp_socket->so_options) == 0) 325 return (EADDRINUSE); 326 if (!t 327 && vestige.valid 328 && !(reuseport && vestige.reuse_port)) 329 return EADDRINUSE; 330 #else 331 return (EADDRNOTAVAIL); 332 #endif 333 } 334 335 { 336 struct in6pcb *t; 337 struct vestigial_inpcb vestige; 338 339 t = in6_pcblookup_port(table, &sin6->sin6_addr, 340 sin6->sin6_port, wild, &vestige); 341 if (t && (reuseport & t->in6p_socket->so_options) == 0) 342 return (EADDRINUSE); 343 if (!t 344 && vestige.valid 345 && !(reuseport && vestige.reuse_port)) 346 return EADDRINUSE; 347 } 348 } 349 350 if (sin6->sin6_port == 0) { 351 int e; 352 e = in6_pcbsetport(sin6, in6p, l); 353 if (e != 0) 354 return (e); 355 } else { 356 in6p->in6p_lport = sin6->sin6_port; 357 in6_pcbstate(in6p, IN6P_BOUND); 358 } 359 360 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 361 LIST_INSERT_HEAD(IN6PCBHASH_PORT(table, in6p->in6p_lport), 362 &in6p->in6p_head, inph_lhash); 363 364 return (0); 365 } 366 367 int 368 in6_pcbbind(void *v, struct mbuf *nam, struct lwp *l) 369 { 370 struct in6pcb *in6p = v; 371 struct sockaddr_in6 lsin6; 372 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 373 int error; 374 375 if (in6p->in6p_af != AF_INET6) 376 return (EINVAL); 377 378 /* 379 * If we already have a local port or a local address it means we're 380 * bounded. 381 */ 382 if (in6p->in6p_lport || !(IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 383 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 384 in6p->in6p_laddr.s6_addr32[3] == 0))) 385 return (EINVAL); 386 387 if (nam != NULL) { 388 /* We were provided a sockaddr_in6 to use. */ 389 sin6 = mtod(nam, struct sockaddr_in6 *); 390 if (nam->m_len != sizeof(*sin6)) 391 return (EINVAL); 392 } else { 393 /* We always bind to *something*, even if it's "anything". */ 394 lsin6 = *((const struct sockaddr_in6 *) 395 in6p->in6p_socket->so_proto->pr_domain->dom_sa_any); 396 sin6 = &lsin6; 397 } 398 399 /* Bind address. */ 400 error = in6_pcbbind_addr(in6p, sin6, l); 401 if (error) 402 return (error); 403 404 /* Bind port. */ 405 error = in6_pcbbind_port(in6p, sin6, l); 406 if (error) { 407 /* 408 * Reset the address here to "any" so we don't "leak" the 409 * in6pcb. 410 */ 411 in6p->in6p_laddr = in6addr_any; 412 413 return (error); 414 } 415 416 417 #if 0 418 in6p->in6p_flowinfo = 0; /* XXX */ 419 #endif 420 return (0); 421 } 422 423 /* 424 * Connect from a socket to a specified address. 425 * Both address and port must be specified in argument sin6. 426 * If don't have a local address for this socket yet, 427 * then pick one. 428 */ 429 int 430 in6_pcbconnect(void *v, struct mbuf *nam, struct lwp *l) 431 { 432 struct rtentry *rt; 433 struct in6pcb *in6p = v; 434 struct in6_addr *in6a = NULL; 435 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 436 struct ifnet *ifp = NULL; /* outgoing interface */ 437 int error = 0; 438 int scope_ambiguous = 0; 439 #ifdef INET 440 struct in6_addr mapped; 441 #endif 442 struct sockaddr_in6 tmp; 443 struct vestigial_inpcb vestige; 444 445 (void)&in6a; /* XXX fool gcc */ 446 447 if (in6p->in6p_af != AF_INET6) 448 return (EINVAL); 449 450 if (nam->m_len != sizeof(*sin6)) 451 return (EINVAL); 452 if (sin6->sin6_family != AF_INET6) 453 return (EAFNOSUPPORT); 454 if (sin6->sin6_port == 0) 455 return (EADDRNOTAVAIL); 456 457 if (sin6->sin6_scope_id == 0 && !ip6_use_defzone) 458 scope_ambiguous = 1; 459 if ((error = sa6_embedscope(sin6, ip6_use_defzone)) != 0) 460 return(error); 461 462 /* sanity check for mapped address case */ 463 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 464 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 465 return EINVAL; 466 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 467 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 468 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 469 return EINVAL; 470 } else 471 { 472 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 473 return EINVAL; 474 } 475 476 /* protect *sin6 from overwrites */ 477 tmp = *sin6; 478 sin6 = &tmp; 479 480 /* Source address selection. */ 481 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 482 in6p->in6p_laddr.s6_addr32[3] == 0) { 483 #ifdef INET 484 struct sockaddr_in sin, *sinp; 485 486 memset(&sin, 0, sizeof(sin)); 487 sin.sin_len = sizeof(sin); 488 sin.sin_family = AF_INET; 489 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr32[3], 490 sizeof(sin.sin_addr)); 491 sinp = in_selectsrc(&sin, &in6p->in6p_route, 492 in6p->in6p_socket->so_options, NULL, &error); 493 if (sinp == 0) { 494 if (error == 0) 495 error = EADDRNOTAVAIL; 496 return (error); 497 } 498 memset(&mapped, 0, sizeof(mapped)); 499 mapped.s6_addr16[5] = htons(0xffff); 500 memcpy(&mapped.s6_addr32[3], &sinp->sin_addr, sizeof(sinp->sin_addr)); 501 in6a = &mapped; 502 #else 503 return EADDRNOTAVAIL; 504 #endif 505 } else { 506 /* 507 * XXX: in6_selectsrc might replace the bound local address 508 * with the address specified by setsockopt(IPV6_PKTINFO). 509 * Is it the intended behavior? 510 */ 511 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 512 in6p->in6p_moptions, 513 &in6p->in6p_route, 514 &in6p->in6p_laddr, &ifp, &error); 515 if (ifp && scope_ambiguous && 516 (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 517 return(error); 518 } 519 520 if (in6a == 0) { 521 if (error == 0) 522 error = EADDRNOTAVAIL; 523 return (error); 524 } 525 } 526 if (ifp == NULL && (rt = rtcache_validate(&in6p->in6p_route)) != NULL) 527 ifp = rt->rt_ifp; 528 529 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 530 531 if (in6_pcblookup_connect(in6p->in6p_table, &sin6->sin6_addr, 532 sin6->sin6_port, 533 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? in6a : &in6p->in6p_laddr, 534 in6p->in6p_lport, 0, &vestige) 535 || vestige.valid) 536 return (EADDRINUSE); 537 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) || 538 (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 539 in6p->in6p_laddr.s6_addr32[3] == 0)) 540 { 541 if (in6p->in6p_lport == 0) { 542 error = in6_pcbbind(in6p, (struct mbuf *)0, l); 543 if (error != 0) 544 return error; 545 } 546 in6p->in6p_laddr = *in6a; 547 } 548 in6p->in6p_faddr = sin6->sin6_addr; 549 in6p->in6p_fport = sin6->sin6_port; 550 in6_pcbstate(in6p, IN6P_CONNECTED); 551 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 552 if (ip6_auto_flowlabel) 553 in6p->in6p_flowinfo |= 554 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 555 #if defined(IPSEC) || defined(FAST_IPSEC) 556 if (in6p->in6p_socket->so_type == SOCK_STREAM) 557 ipsec_pcbconn(in6p->in6p_sp); 558 #endif 559 return (0); 560 } 561 562 void 563 in6_pcbdisconnect(struct in6pcb *in6p) 564 { 565 memset((void *)&in6p->in6p_faddr, 0, sizeof(in6p->in6p_faddr)); 566 in6p->in6p_fport = 0; 567 in6_pcbstate(in6p, IN6P_BOUND); 568 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 569 #if defined(IPSEC) || defined(FAST_IPSEC) 570 ipsec_pcbdisconn(in6p->in6p_sp); 571 #endif 572 if (in6p->in6p_socket->so_state & SS_NOFDREF) 573 in6_pcbdetach(in6p); 574 } 575 576 void 577 in6_pcbdetach(struct in6pcb *in6p) 578 { 579 struct socket *so = in6p->in6p_socket; 580 int s; 581 582 if (in6p->in6p_af != AF_INET6) 583 return; 584 585 #if defined(IPSEC) || defined(FAST_IPSEC) 586 ipsec6_delete_pcbpolicy(in6p); 587 #endif /* IPSEC */ 588 so->so_pcb = 0; 589 if (in6p->in6p_options) 590 m_freem(in6p->in6p_options); 591 if (in6p->in6p_outputopts != NULL) { 592 ip6_clearpktopts(in6p->in6p_outputopts, -1); 593 free(in6p->in6p_outputopts, M_IP6OPT); 594 } 595 rtcache_free(&in6p->in6p_route); 596 ip6_freemoptions(in6p->in6p_moptions); 597 s = splnet(); 598 in6_pcbstate(in6p, IN6P_ATTACHED); 599 LIST_REMOVE(&in6p->in6p_head, inph_lhash); 600 CIRCLEQ_REMOVE(&in6p->in6p_table->inpt_queue, &in6p->in6p_head, 601 inph_queue); 602 pool_put(&in6pcb_pool, in6p); 603 splx(s); 604 sofree(so); /* drops the socket's lock */ 605 mutex_enter(softnet_lock); /* reacquire it */ 606 } 607 608 void 609 in6_setsockaddr(struct in6pcb *in6p, struct mbuf *nam) 610 { 611 struct sockaddr_in6 *sin6; 612 613 if (in6p->in6p_af != AF_INET6) 614 return; 615 616 nam->m_len = sizeof(*sin6); 617 sin6 = mtod(nam, struct sockaddr_in6 *); 618 sockaddr_in6_init(sin6, &in6p->in6p_laddr, in6p->in6p_lport, 0, 0); 619 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 620 } 621 622 void 623 in6_setpeeraddr(struct in6pcb *in6p, struct mbuf *nam) 624 { 625 struct sockaddr_in6 *sin6; 626 627 if (in6p->in6p_af != AF_INET6) 628 return; 629 630 nam->m_len = sizeof(*sin6); 631 sin6 = mtod(nam, struct sockaddr_in6 *); 632 sockaddr_in6_init(sin6, &in6p->in6p_faddr, in6p->in6p_fport, 0, 0); 633 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 634 } 635 636 /* 637 * Pass some notification to all connections of a protocol 638 * associated with address dst. The local address and/or port numbers 639 * may be specified to limit the search. The "usual action" will be 640 * taken, depending on the ctlinput cmd. The caller must filter any 641 * cmds that are uninteresting (e.g., no error in the map). 642 * Call the protocol specific routine (if any) to report 643 * any errors for each matching socket. 644 * 645 * Must be called at splsoftnet. 646 * 647 * Note: src (4th arg) carries the flowlabel value on the original IPv6 648 * header, in sin6_flowinfo member. 649 */ 650 int 651 in6_pcbnotify(struct inpcbtable *table, const struct sockaddr *dst, 652 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, int cmd, 653 void *cmdarg, void (*notify)(struct in6pcb *, int)) 654 { 655 struct rtentry *rt; 656 struct in6pcb *in6p, *nin6p; 657 struct sockaddr_in6 sa6_src; 658 const struct sockaddr_in6 *sa6_dst; 659 u_int16_t fport = fport_arg, lport = lport_arg; 660 int errno; 661 int nmatch = 0; 662 u_int32_t flowinfo; 663 664 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 665 return 0; 666 667 sa6_dst = (const struct sockaddr_in6 *)dst; 668 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 669 return 0; 670 671 /* 672 * note that src can be NULL when we get notify by local fragmentation. 673 */ 674 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 675 flowinfo = sa6_src.sin6_flowinfo; 676 677 /* 678 * Redirects go to all references to the destination, 679 * and use in6_rtchange to invalidate the route cache. 680 * Dead host indications: also use in6_rtchange to invalidate 681 * the cache, and deliver the error to all the sockets. 682 * Otherwise, if we have knowledge of the local port and address, 683 * deliver only to that socket. 684 */ 685 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 686 fport = 0; 687 lport = 0; 688 memset((void *)&sa6_src.sin6_addr, 0, sizeof(sa6_src.sin6_addr)); 689 690 if (cmd != PRC_HOSTDEAD) 691 notify = in6_rtchange; 692 } 693 694 errno = inet6ctlerrmap[cmd]; 695 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 696 in6p != (void *)&table->inpt_queue; 697 in6p = nin6p) { 698 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 699 700 if (in6p->in6p_af != AF_INET6) 701 continue; 702 703 /* 704 * Under the following condition, notify of redirects 705 * to the pcb, without making address matches against inpcb. 706 * - redirect notification is arrived. 707 * - the inpcb is unconnected. 708 * - the inpcb is caching !RTF_HOST routing entry. 709 * - the ICMPv6 notification is from the gateway cached in the 710 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 711 * the inpcb used very recently. 712 * 713 * This is to improve interaction between netbsd/openbsd 714 * redirect handling code, and inpcb route cache code. 715 * without the clause, !RTF_HOST routing entry (which carries 716 * gateway used by inpcb right before the ICMPv6 redirect) 717 * will be cached forever in unconnected inpcb. 718 * 719 * There still is a question regarding to what is TRT: 720 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 721 * generated on packet output. inpcb will always cache 722 * RTF_HOST routing entry so there's no need for the clause 723 * (ICMPv6 redirect will update RTF_HOST routing entry, 724 * and inpcb is caching it already). 725 * However, bsdi/freebsd are vulnerable to local DoS attacks 726 * due to the cloned routing entries. 727 * - Specwise, "destination cache" is mentioned in RFC2461. 728 * Jinmei says that it implies bsdi/freebsd behavior, itojun 729 * is not really convinced. 730 * - Having hiwat/lowat on # of cloned host route (redirect/ 731 * pmtud) may be a good idea. netbsd/openbsd has it. see 732 * icmp6_mtudisc_update(). 733 */ 734 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 735 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 736 (rt = rtcache_validate(&in6p->in6p_route)) != NULL && 737 !(rt->rt_flags & RTF_HOST)) { 738 const struct sockaddr_in6 *dst6; 739 740 dst6 = (const struct sockaddr_in6 *) 741 rtcache_getdst(&in6p->in6p_route); 742 if (dst6 == NULL) 743 ; 744 else if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 745 &sa6_dst->sin6_addr)) 746 goto do_notify; 747 } 748 749 /* 750 * If the error designates a new path MTU for a destination 751 * and the application (associated with this socket) wanted to 752 * know the value, notify. Note that we notify for all 753 * disconnected sockets if the corresponding application 754 * wanted. This is because some UDP applications keep sending 755 * sockets disconnected. 756 * XXX: should we avoid to notify the value to TCP sockets? 757 */ 758 if (cmd == PRC_MSGSIZE && (in6p->in6p_flags & IN6P_MTU) != 0 && 759 (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) || 760 IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &sa6_dst->sin6_addr))) { 761 ip6_notify_pmtu(in6p, (const struct sockaddr_in6 *)dst, 762 (u_int32_t *)cmdarg); 763 } 764 765 /* 766 * Detect if we should notify the error. If no source and 767 * destination ports are specified, but non-zero flowinfo and 768 * local address match, notify the error. This is the case 769 * when the error is delivered with an encrypted buffer 770 * by ESP. Otherwise, just compare addresses and ports 771 * as usual. 772 */ 773 if (lport == 0 && fport == 0 && flowinfo && 774 in6p->in6p_socket != NULL && 775 flowinfo == (in6p->in6p_flowinfo & IPV6_FLOWLABEL_MASK) && 776 IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &sa6_src.sin6_addr)) 777 goto do_notify; 778 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 779 &sa6_dst->sin6_addr) || 780 in6p->in6p_socket == 0 || 781 (lport && in6p->in6p_lport != lport) || 782 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 783 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 784 &sa6_src.sin6_addr)) || 785 (fport && in6p->in6p_fport != fport)) 786 continue; 787 788 do_notify: 789 if (notify) 790 (*notify)(in6p, errno); 791 nmatch++; 792 } 793 return nmatch; 794 } 795 796 void 797 in6_pcbpurgeif0(struct inpcbtable *table, struct ifnet *ifp) 798 { 799 struct in6pcb *in6p, *nin6p; 800 struct ip6_moptions *im6o; 801 struct in6_multi_mship *imm, *nimm; 802 803 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 804 in6p != (void *)&table->inpt_queue; 805 in6p = nin6p) { 806 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 807 if (in6p->in6p_af != AF_INET6) 808 continue; 809 810 im6o = in6p->in6p_moptions; 811 if (im6o) { 812 /* 813 * Unselect the outgoing interface if it is being 814 * detached. 815 */ 816 if (im6o->im6o_multicast_ifp == ifp) 817 im6o->im6o_multicast_ifp = NULL; 818 819 /* 820 * Drop multicast group membership if we joined 821 * through the interface being detached. 822 * XXX controversial - is it really legal for kernel 823 * to force this? 824 */ 825 for (imm = im6o->im6o_memberships.lh_first; 826 imm != NULL; imm = nimm) { 827 nimm = imm->i6mm_chain.le_next; 828 if (imm->i6mm_maddr->in6m_ifp == ifp) { 829 LIST_REMOVE(imm, i6mm_chain); 830 in6_leavegroup(imm); 831 } 832 } 833 } 834 } 835 } 836 837 void 838 in6_pcbpurgeif(struct inpcbtable *table, struct ifnet *ifp) 839 { 840 struct rtentry *rt; 841 struct in6pcb *in6p, *nin6p; 842 843 for (in6p = (struct in6pcb *)CIRCLEQ_FIRST(&table->inpt_queue); 844 in6p != (void *)&table->inpt_queue; 845 in6p = nin6p) { 846 nin6p = (struct in6pcb *)CIRCLEQ_NEXT(in6p, in6p_queue); 847 if (in6p->in6p_af != AF_INET6) 848 continue; 849 if ((rt = rtcache_validate(&in6p->in6p_route)) != NULL && 850 rt->rt_ifp == ifp) 851 in6_rtchange(in6p, 0); 852 } 853 } 854 855 /* 856 * Check for alternatives when higher level complains 857 * about service problems. For now, invalidate cached 858 * routing information. If the route was created dynamically 859 * (by a redirect), time to try a default gateway again. 860 */ 861 void 862 in6_losing(struct in6pcb *in6p) 863 { 864 struct rtentry *rt; 865 struct rt_addrinfo info; 866 867 if (in6p->in6p_af != AF_INET6) 868 return; 869 870 if ((rt = rtcache_validate(&in6p->in6p_route)) == NULL) 871 return; 872 873 memset(&info, 0, sizeof(info)); 874 info.rti_info[RTAX_DST] = rtcache_getdst(&in6p->in6p_route); 875 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 876 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 877 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 878 if (rt->rt_flags & RTF_DYNAMIC) { 879 (void)rtrequest(RTM_DELETE, rt_getkey(rt), 880 rt->rt_gateway, rt_mask(rt), rt->rt_flags, NULL); 881 } 882 /* 883 * A new route can be allocated 884 * the next time output is attempted. 885 */ 886 rtcache_free(&in6p->in6p_route); 887 } 888 889 /* 890 * After a routing change, flush old routing. A new route can be 891 * allocated the next time output is attempted. 892 */ 893 void 894 in6_rtchange(struct in6pcb *in6p, int errno) 895 { 896 if (in6p->in6p_af != AF_INET6) 897 return; 898 899 rtcache_free(&in6p->in6p_route); 900 /* 901 * A new route can be allocated the next time 902 * output is attempted. 903 */ 904 } 905 906 struct in6pcb * 907 in6_pcblookup_port(struct inpcbtable *table, struct in6_addr *laddr6, 908 u_int lport_arg, int lookup_wildcard, struct vestigial_inpcb *vp) 909 { 910 struct inpcbhead *head; 911 struct inpcb_hdr *inph; 912 struct in6pcb *in6p, *match = 0; 913 int matchwild = 3, wildcard; 914 u_int16_t lport = lport_arg; 915 916 if (vp) 917 vp->valid = 0; 918 919 head = IN6PCBHASH_PORT(table, lport); 920 LIST_FOREACH(inph, head, inph_lhash) { 921 in6p = (struct in6pcb *)inph; 922 if (in6p->in6p_af != AF_INET6) 923 continue; 924 925 if (in6p->in6p_lport != lport) 926 continue; 927 wildcard = 0; 928 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 929 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 930 continue; 931 } 932 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 933 wildcard++; 934 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) { 935 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 936 continue; 937 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 938 continue; 939 940 /* duplicate of IPv4 logic */ 941 wildcard = 0; 942 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) && 943 in6p->in6p_faddr.s6_addr32[3]) 944 wildcard++; 945 if (!in6p->in6p_laddr.s6_addr32[3]) { 946 if (laddr6->s6_addr32[3]) 947 wildcard++; 948 } else { 949 if (!laddr6->s6_addr32[3]) 950 wildcard++; 951 else { 952 if (in6p->in6p_laddr.s6_addr32[3] != 953 laddr6->s6_addr32[3]) 954 continue; 955 } 956 } 957 } else if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 958 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 959 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 960 continue; 961 } 962 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 963 wildcard++; 964 } else { 965 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 966 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 967 continue; 968 } 969 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 970 wildcard++; 971 else { 972 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 973 laddr6)) 974 continue; 975 } 976 } 977 if (wildcard && !lookup_wildcard) 978 continue; 979 if (wildcard < matchwild) { 980 match = in6p; 981 matchwild = wildcard; 982 if (matchwild == 0) 983 break; 984 } 985 } 986 if (match && matchwild == 0) 987 return match; 988 989 if (vp && table->vestige && table->vestige->init_ports6) { 990 struct vestigial_inpcb better; 991 void *state; 992 993 state = (*table->vestige->init_ports6)(laddr6, 994 lport_arg, 995 lookup_wildcard); 996 while (table->vestige 997 && (*table->vestige->next_port6)(state, vp)) { 998 999 if (vp->lport != lport) 1000 continue; 1001 wildcard = 0; 1002 if (!IN6_IS_ADDR_UNSPECIFIED(&vp->faddr.v6)) 1003 wildcard++; 1004 if (IN6_IS_ADDR_UNSPECIFIED(&vp->laddr.v6)) { 1005 if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1006 wildcard++; 1007 } else { 1008 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1009 if (vp->v6only) 1010 continue; 1011 } 1012 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 1013 wildcard++; 1014 else { 1015 if (!IN6_ARE_ADDR_EQUAL(&vp->laddr.v6, laddr6)) 1016 continue; 1017 } 1018 } 1019 if (wildcard && !lookup_wildcard) 1020 continue; 1021 if (wildcard < matchwild) { 1022 better = *vp; 1023 match = (void*)&better; 1024 1025 matchwild = wildcard; 1026 if (matchwild == 0) 1027 break; 1028 } 1029 } 1030 1031 if (match) { 1032 if (match != (void*)&better) 1033 return match; 1034 else { 1035 *vp = better; 1036 return 0; 1037 } 1038 } 1039 } 1040 return (match); 1041 } 1042 #undef continue 1043 1044 /* 1045 * WARNING: return value (rtentry) could be IPv4 one if in6pcb is connected to 1046 * IPv4 mapped address. 1047 */ 1048 struct rtentry * 1049 in6_pcbrtentry(struct in6pcb *in6p) 1050 { 1051 struct rtentry *rt; 1052 struct route *ro; 1053 union { 1054 const struct sockaddr *sa; 1055 const struct sockaddr_in6 *sa6; 1056 #ifdef INET 1057 const struct sockaddr_in *sa4; 1058 #endif 1059 } cdst; 1060 1061 ro = &in6p->in6p_route; 1062 1063 if (in6p->in6p_af != AF_INET6) 1064 return (NULL); 1065 1066 cdst.sa = rtcache_getdst(ro); 1067 if (cdst.sa == NULL) 1068 ; 1069 #ifdef INET 1070 else if (cdst.sa->sa_family == AF_INET) { 1071 KASSERT(IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)); 1072 if (cdst.sa4->sin_addr.s_addr != in6p->in6p_faddr.s6_addr32[3]) 1073 rtcache_free(ro); 1074 } 1075 #endif 1076 else { 1077 if (!IN6_ARE_ADDR_EQUAL(&cdst.sa6->sin6_addr, 1078 &in6p->in6p_faddr)) 1079 rtcache_free(ro); 1080 } 1081 if ((rt = rtcache_validate(ro)) == NULL) 1082 rt = rtcache_update(ro, 1); 1083 #ifdef INET 1084 if (rt == NULL && IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) { 1085 union { 1086 struct sockaddr dst; 1087 struct sockaddr_in dst4; 1088 } u; 1089 struct in_addr addr; 1090 1091 addr.s_addr = in6p->in6p_faddr.s6_addr32[3]; 1092 1093 sockaddr_in_init(&u.dst4, &addr, 0); 1094 rtcache_setdst(ro, &u.dst); 1095 1096 rt = rtcache_init(ro); 1097 } else 1098 #endif 1099 if (rt == NULL && !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 1100 union { 1101 struct sockaddr dst; 1102 struct sockaddr_in6 dst6; 1103 } u; 1104 1105 sockaddr_in6_init(&u.dst6, &in6p->in6p_faddr, 0, 0, 0); 1106 rtcache_setdst(ro, &u.dst); 1107 1108 rt = rtcache_init(ro); 1109 } 1110 return rt; 1111 } 1112 1113 struct in6pcb * 1114 in6_pcblookup_connect(struct inpcbtable *table, const struct in6_addr *faddr6, 1115 u_int fport_arg, const struct in6_addr *laddr6, u_int lport_arg, 1116 int faith, 1117 struct vestigial_inpcb *vp) 1118 { 1119 struct inpcbhead *head; 1120 struct inpcb_hdr *inph; 1121 struct in6pcb *in6p; 1122 u_int16_t fport = fport_arg, lport = lport_arg; 1123 1124 if (vp) 1125 vp->valid = 0; 1126 1127 head = IN6PCBHASH_CONNECT(table, faddr6, fport, laddr6, lport); 1128 LIST_FOREACH(inph, head, inph_hash) { 1129 in6p = (struct in6pcb *)inph; 1130 if (in6p->in6p_af != AF_INET6) 1131 continue; 1132 1133 /* find exact match on both source and dest */ 1134 if (in6p->in6p_fport != fport) 1135 continue; 1136 if (in6p->in6p_lport != lport) 1137 continue; 1138 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 1139 continue; 1140 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 1141 continue; 1142 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 1143 continue; 1144 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1145 continue; 1146 if ((IN6_IS_ADDR_V4MAPPED(laddr6) || 1147 IN6_IS_ADDR_V4MAPPED(faddr6)) && 1148 (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) 1149 continue; 1150 return in6p; 1151 } 1152 if (vp && table->vestige) { 1153 if ((*table->vestige->lookup6)(faddr6, fport_arg, 1154 laddr6, lport_arg, vp)) 1155 return 0; 1156 } 1157 1158 return NULL; 1159 } 1160 1161 struct in6pcb * 1162 in6_pcblookup_bind(struct inpcbtable *table, const struct in6_addr *laddr6, 1163 u_int lport_arg, int faith) 1164 { 1165 struct inpcbhead *head; 1166 struct inpcb_hdr *inph; 1167 struct in6pcb *in6p; 1168 u_int16_t lport = lport_arg; 1169 #ifdef INET 1170 struct in6_addr zero_mapped; 1171 #endif 1172 1173 head = IN6PCBHASH_BIND(table, laddr6, lport); 1174 LIST_FOREACH(inph, head, inph_hash) { 1175 in6p = (struct in6pcb *)inph; 1176 if (in6p->in6p_af != AF_INET6) 1177 continue; 1178 1179 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1180 continue; 1181 if (in6p->in6p_fport != 0) 1182 continue; 1183 if (in6p->in6p_lport != lport) 1184 continue; 1185 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1186 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1187 continue; 1188 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 1189 goto out; 1190 } 1191 #ifdef INET 1192 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 1193 memset(&zero_mapped, 0, sizeof(zero_mapped)); 1194 zero_mapped.s6_addr16[5] = 0xffff; 1195 head = IN6PCBHASH_BIND(table, &zero_mapped, lport); 1196 LIST_FOREACH(inph, head, inph_hash) { 1197 in6p = (struct in6pcb *)inph; 1198 if (in6p->in6p_af != AF_INET6) 1199 continue; 1200 1201 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1202 continue; 1203 if (in6p->in6p_fport != 0) 1204 continue; 1205 if (in6p->in6p_lport != lport) 1206 continue; 1207 if ((in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1208 continue; 1209 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zero_mapped)) 1210 goto out; 1211 } 1212 } 1213 #endif 1214 head = IN6PCBHASH_BIND(table, &zeroin6_addr, lport); 1215 LIST_FOREACH(inph, head, inph_hash) { 1216 in6p = (struct in6pcb *)inph; 1217 if (in6p->in6p_af != AF_INET6) 1218 continue; 1219 1220 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 1221 continue; 1222 if (in6p->in6p_fport != 0) 1223 continue; 1224 if (in6p->in6p_lport != lport) 1225 continue; 1226 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 1227 (in6p->in6p_flags & IN6P_IPV6_V6ONLY) != 0) 1228 continue; 1229 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &zeroin6_addr)) 1230 goto out; 1231 } 1232 return (NULL); 1233 1234 out: 1235 inph = &in6p->in6p_head; 1236 if (inph != LIST_FIRST(head)) { 1237 LIST_REMOVE(inph, inph_hash); 1238 LIST_INSERT_HEAD(head, inph, inph_hash); 1239 } 1240 return in6p; 1241 } 1242 1243 void 1244 in6_pcbstate(struct in6pcb *in6p, int state) 1245 { 1246 1247 if (in6p->in6p_af != AF_INET6) 1248 return; 1249 1250 if (in6p->in6p_state > IN6P_ATTACHED) 1251 LIST_REMOVE(&in6p->in6p_head, inph_hash); 1252 1253 switch (state) { 1254 case IN6P_BOUND: 1255 LIST_INSERT_HEAD(IN6PCBHASH_BIND(in6p->in6p_table, 1256 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1257 inph_hash); 1258 break; 1259 case IN6P_CONNECTED: 1260 LIST_INSERT_HEAD(IN6PCBHASH_CONNECT(in6p->in6p_table, 1261 &in6p->in6p_faddr, in6p->in6p_fport, 1262 &in6p->in6p_laddr, in6p->in6p_lport), &in6p->in6p_head, 1263 inph_hash); 1264 break; 1265 } 1266 1267 in6p->in6p_state = state; 1268 } 1269